Hilum

Definition

The hilum of the lung is an indented region on its mediastinal surface through which bronchi, blood vessels, lymph vessels, and nerves enter and exit the lung. It acts as a critical hub for the respiratory system's plumbing and wiring.

Related terms

Bronchi:

Tubes that carry air from the trachea into the lungs, branching into smaller tubes within each lung.

Pulmonary arteries: Blood vessels that carry deoxygenated blood from the heart to the lungs for oxygenation.

Lymph vessels: Part of the lymphatic system; they transport lymph fluids around the body, including through the lungs for filtration and immunity enhancement